CN201954025U - Fireproof buried type dual-seat all-welded flat gate valve - Google Patents
Fireproof buried type dual-seat all-welded flat gate valve Download PDFInfo
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- CN201954025U CN201954025U CN2011200277393U CN201120027739U CN201954025U CN 201954025 U CN201954025 U CN 201954025U CN 2011200277393 U CN2011200277393 U CN 2011200277393U CN 201120027739 U CN201120027739 U CN 201120027739U CN 201954025 U CN201954025 U CN 201954025U
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- valve
- seat
- valve seat
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- sealing
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Abstract
The utility model discloses a fireproof buried type dual-seat all-welded flat gate valve, which comprises a valve body, a valve cover, a valve stem, a gate and two valve seats. The valve body and the valve cover are connected by adopting an integrated all-welded structure through welding, and the valve body and pipelines at the two ends are also connected by adopting an integrated all-welded structure through welding; a main valve seat and the valve body are combined in a sealing way through an O-shaped sealing ring and a fireproof sealing ring, so that the valve body has the function of preventing fire and leakage; the dual-layer valve seat structure formed by matching arrangement of the main valve seat and an auxiliary valve seat is used as a closed sealing component, so as to form four seal pairs with a gate disc when the valve is closed fully, and more reliable sealing of the valve can be guaranteed; and when the main valve seat fails in sealing, the auxiliary valve seat can achieve full sealing, and the sealing force can be increased due to the increased pipeline pressure, so that the sealing of the auxiliary valve seat becomes more reliable. In addition, since the auxiliary valve seat achieves sealing by elastic force of a spring, the valve has the functions of dual blockage and dual discharging.
Description
Technical field
The utility model relates to a kind of valve, relates in particular to the full welding plate gate valve of the buried dual valve seat of a kind of fire-proof.
Background technique
At present, existing pipe-line mainly comprises valve body with buried band pod apertures plate valve, valve gap, valve rod, flashboard, valve seat, thereby drive the open and-shut mode that moves up and down control valve of flashboard by rotatablely moving of valve rod, be provided with the flow channel and the flow pass that flow for working medium in the valve body, be provided with the lumen that to place flashboard between described flow channel and the flow pass, described flashboard be one two-sided parallel and have and be convenient to pipeline cleaning flat board with pod apertures, be provided with valve seat at flow channel and flow pass and valve body lumen place, described valve seat is to embed synthetic plastic to make sealing surface and its axis and valve body and advance, the axis overlaid of outlet passage, valve seat can move relative to valve body, the sealing of valve mainly relies on medium working pressure promotion floating valve seat and flashboard to form, and soft-hard sealing pair realizes that described valve body lumen communicates with inlet passage always and is full of working medium with pressure under operating mode; Adopt flange gasket to be connected between described valve body and pipeline, valve body and the valve gap, 0 shape rubber seal is all adopted in the sealing between the sealing between valve seat and the valve body, valve rod and the valve gap.
Common problem below the buried band pod apertures plate valve of this routine takes place easily under operating mode: in case 1, the breaking out of fire of gas pipeline system, this product structure does not possess fire-proof function, flange gasket and 0 shape rubber seal meeting scaling loss, the intensity of a fire can spread to valve outside and pipe downstream underground pipelines entirely, brings serious safety problem to gas-fired equipment system and people's lives and properties; 2, this product is used under ground piping, and flange-pad pattern is all adopted in the sealing between valve body and the valve gap, between valve body two end part and the pipeline, when pad lost efficacy when producing dielectric leakage, is difficult to find timely processing, stays potential safety hazard; 3, the seal ring material on the valve seat adopts the plastics of organic synthesis usually, form soft-hard sealing pair with flashboard, such structure be arranged in the valve switch process along with flashboard and valve seat each time near closed condition or just opened the slot circulation area phenomenon that moment forms the working medium flow velocity is increased rapidly, fluid at a high speed very easily washes away the plastic seal ring that damages on the valve seat, thereby causes seal failure; 4, such valve is the single face sealing configuration, and this structure does not possess the function of online emptying valve body lumen working medium, can not satisfy following pair of demand of blocking-discharging of operating mode.
Summary of the invention
At the deficiencies in the prior art, the utility model provide a kind of valve body for be welded to connect entirely, dual valve seat, multi-sealed, with burying do not have leakage, have the full welding plate gate valve of the buried dual valve seat of fire-proof of fire-proof function and two blocking-discharge function.
For achieving the above object, the utility model provides the buried dual valve seat of a kind of fire-proof full welding plate gate valve, comprise valve body, valve gap, valve rod, flashboard, valve seat, valve gap is located on the valve body, valve rod one end passes valve gap and is connected with the flashboard that is located at body cavity, the valve rod the other end is equipped with the driving handwheel, the flashboard bilateral symmetry is provided with valve seat, the integrated welding of described valve body and valve gap sets firmly, the entrance point of body cavity runner and outlet end are provided with the welded structure that can supply with pipeline welding, described valve seat is made up of main valve seat and auxiliary-seat, be provided with main O RunddichtringO and fire proof seal circle between main valve seat and the valve body, be provided with secondary O RunddichtringO between main valve seat and the auxiliary-seat, be provided with the primary seal circle between main valve seat and the flashboard, be provided with secondary seal ring between auxiliary-seat and the flashboard.
The utility model can further be set to the outside that described auxiliary-seat is set in main valve seat, it between main valve seat and the auxiliary-seat Spielpassung, the inner ring surface of auxiliary-seat is step-like, the outer ring surface of main valve seat is provided with the step surface of auxiliary-seat inner ring surface and blocks the shoulder rank of joining mutually, is provided with spring between auxiliary-seat and the valve body.
The utility model also can further be set to described valve body and valve gap welding end surface and be provided with narrow gap U type bevel for welding, and the welded structure that described valve body is connected with pipeline is for being provided with the special-purpose groove that can supply with pipeline welding in the exterior edge face of body cavity runner entrance point and outlet end.
The utility model also can further be set to also be provided with the floss hole that is connected with body cavity on the valve body, is equipped with plug screw on the described floss hole.
The beneficial effects of the utility model are: because described valve body and the integrated welding of valve gap set firmly, the entrance point of body cavity runner and outlet end are provided with the welded structure that can supply with pipeline welding, the welded structure that valve body and pipeline welding are become one, make valve body have the leak outside full welding connection structure of possibility of exhausted nothing, sealing configuration between described main valve seat and the valve body is the combination seal of main O RunddichtringO and fire proof seal circle, and described combined sealing structure has not only improved sealability but also can thoroughly cut off fire when unexpected breaking out of fire and spreads outside valve or spread to the pipe interior downstream; Such structure setting has simultaneously also reduced valve body three ends to be the weight that connects of flange originally and to have exempted the long-term use and maintenance cost that flange connects.Work as flashboard in addition in the complete shut-down position, the working medium pressure of flow channel promotes flashboard and acts on the valve seat of flow pass, with the main valve seat at flow pass place and primary seal circle on the auxiliary-seat and secondary seal ring formation flow pass side double seal pair, simultaneously the main valve seat at flow channel place and auxiliary-seat respectively main valve seat behind main O shape circle and the elastic force acting in conjunction of auxiliary-seat spring behind under respectively separately primary seal circle and the secondary seal ring on the valve seat be pressed onto formation flow channel side double seal pair on the flashboard, thereby on flashboard, form four road sealing pairs between the downstream line, guaranteeing that valve is closely closed do not have to leak, when in case the primary seal circle on the main valve seat lost efficacy because of the instantaneous high-velocity fluid that occurs in the switch repeatedly washes away repeatedly, secondary seal ring on the auxiliary-seat not only can continue to bear whole seal actions, and because pipeline pressure passes through the main valve seat sealing surface of inefficacy, increased sealing force thereby act on the back side of auxiliary-seat, made the secondary seal ring sealing more effective.Such structure setting also can be when the valve complete shut-down, because the auxiliary-seat sealing is to rely on the elastic force of its behind spring to realize sealing, so can not influence sealability because of the discharging of body cavity cavity, therefore, this dual valve seat construction discharges in the valve body working medium when valve complete shut-down position still can keep the secondary and downstream sealing pair tight seal of valve upstream seal, pair blocks the double performance requirements of putting thereby reach.
Description of drawings
Fig. 1 is a structure sectional view of the present utility model;
Fig. 2 is the I portion enlarged view of Fig. 1.
Embodiment
As Fig. 1, provided the full welding plate gate valve of the buried dual valve seat of a kind of fire-proof shown in 2, comprise valve body 1, valve gap 2, valve rod 3, flashboard 4, valve seat, valve gap 2 is located on the valve body 1, valve rod 3 one ends pass valve gap 2 and are connected with the flashboard 4 that is located at valve body 1 inner chamber, valve rod 3 the other ends are equipped with and drive handwheel 5, flashboard 4 bilateral symmetry are provided with valve seat, described valve body 1 is provided with narrow gap U type bevel for welding 11 with valve gap 2 welding end surface, valve body 1 and valve gap 2 integrated welding can be set firmly by welding narrow gap U type bevel for welding 11, the entrance point of valve body 1 inner chamber runner and outlet end are provided with the welded structure that can supply with pipeline welding, and described welded structure is for being provided with the special-purpose groove 12 that can supply with pipeline welding in the exterior edge face of valve body 1 inner chamber runner entrance point and outlet end.Described valve seat is made up of main valve seat 6 and auxiliary-seat 7, described auxiliary-seat 7 is set in the outside of main valve seat 6, be Spielpassung between main valve seat 6 and the auxiliary-seat 7, the inner ring surface of auxiliary-seat 7 is step-like, the outer ring surface of main valve seat 6 is provided with the step surface 71 of auxiliary-seat 7 inner ring surfaces and blocks the shoulder rank 61 of joining mutually, be provided with spring 8 between auxiliary-seat 7 and the valve body 1, be provided with main O RunddichtringO 62 and fire proof seal circle 63 between main valve seat 6 and the valve body 1, described fire proof seal circle 63 can adopt the flexible graphite material with fire-proof function, be provided with secondary O RunddichtringO 72 between main valve seat 6 and the auxiliary-seat 7, be provided with primary seal circle 64 between main valve seat 6 and the flashboard 4, be provided with secondary seal ring 73 between auxiliary-seat 7 and the flashboard 4.Also be provided with the floss hole 13 with valve body 1 intracavity inter-connection on the valve body 1, be equipped with plug screw 9 on the described floss hole 13.
Claims (5)
1. full welding plate gate valve of the buried dual valve seat of fire-proof, comprise valve body, valve gap, valve rod, flashboard, valve seat, valve gap is located on the valve body, valve rod one end passes valve gap and is connected with the flashboard that is located at body cavity, the valve rod the other end is equipped with the driving handwheel, the flashboard bilateral symmetry is provided with valve seat, it is characterized in that: the integrated welding of described valve body and valve gap sets firmly, the entrance point of body cavity runner and outlet end are provided with the welded structure that can supply with pipeline welding, described valve seat is made up of main valve seat and auxiliary-seat, be provided with main O RunddichtringO and fire proof seal circle between main valve seat and the valve body, be provided with secondary O RunddichtringO between main valve seat and the auxiliary-seat, be provided with the primary seal circle between main valve seat and the flashboard, be provided with secondary seal ring between auxiliary-seat and the flashboard.
2. the full welding plate gate valve of the buried dual valve seat of fire-proof according to claim 1, it is characterized in that: described auxiliary-seat is set in the outside of main valve seat, it between main valve seat and the auxiliary-seat Spielpassung, the inner ring surface of auxiliary-seat is step-like, the outer ring surface of main valve seat is provided with the step surface of auxiliary-seat inner ring surface and blocks the shoulder rank of joining mutually, is provided with spring between auxiliary-seat and the valve body.
3. the full welding plate gate valve of the buried dual valve seat of fire-proof according to claim 1 and 2, it is characterized in that: described valve body and valve gap welding end surface are provided with narrow gap U type bevel for welding, and the welded structure that described valve body is connected with pipeline is for being provided with the special-purpose groove that can supply with pipeline welding in the exterior edge face of body cavity runner entrance point and outlet end.
4. the full welding plate gate valve of the buried dual valve seat of fire-proof according to claim 1 and 2 is characterized in that: also be provided with the floss hole that is connected with body cavity on the valve body, be equipped with plug screw on the described floss hole.
5. the full welding plate gate valve of the buried dual valve seat of fire-proof according to claim 3 is characterized in that: also be provided with the floss hole that is connected with body cavity on the valve body, be equipped with plug screw on the described floss hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200277393U CN201954025U (en) | 2011-01-27 | 2011-01-27 | Fireproof buried type dual-seat all-welded flat gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200277393U CN201954025U (en) | 2011-01-27 | 2011-01-27 | Fireproof buried type dual-seat all-welded flat gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201954025U true CN201954025U (en) | 2011-08-31 |
Family
ID=44498135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200277393U Expired - Lifetime CN201954025U (en) | 2011-01-27 | 2011-01-27 | Fireproof buried type dual-seat all-welded flat gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201954025U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720852A (en) * | 2012-05-31 | 2012-10-10 | 圣博莱阀门有限公司 | Wear-resistant sliding-plate valve |
| CN102748495A (en) * | 2012-07-18 | 2012-10-24 | 嘉士凯（苏州）阀门配件有限公司 | Valve used in ultra-low temperature working condition |
| CN104633157A (en) * | 2015-02-27 | 2015-05-20 | 天津绿清管道科技股份有限公司 | Two-piece-type clamping plate valve suitable for pressure tapping and plugging of long-distance pipeline |
| CN109854767A (en) * | 2019-02-19 | 2019-06-07 | 成都乘风阀门有限责任公司 | Compound seal valve seat construction flat gate valve |
| CN113494620A (en) * | 2021-07-27 | 2021-10-12 | 刘玉连 | Gate valve |
| CN117570217A (en) * | 2024-01-17 | 2024-02-20 | 哈电集团哈尔滨电站阀门有限公司 | Double-channel parallel double-flashboard gate valve |
-
2011
- 2011-01-27 CN CN2011200277393U patent/CN201954025U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720852A (en) * | 2012-05-31 | 2012-10-10 | 圣博莱阀门有限公司 | Wear-resistant sliding-plate valve |
| CN102748495A (en) * | 2012-07-18 | 2012-10-24 | 嘉士凯（苏州）阀门配件有限公司 | Valve used in ultra-low temperature working condition |
| CN104633157A (en) * | 2015-02-27 | 2015-05-20 | 天津绿清管道科技股份有限公司 | Two-piece-type clamping plate valve suitable for pressure tapping and plugging of long-distance pipeline |
| CN109854767A (en) * | 2019-02-19 | 2019-06-07 | 成都乘风阀门有限责任公司 | Compound seal valve seat construction flat gate valve |
| CN113494620A (en) * | 2021-07-27 | 2021-10-12 | 刘玉连 | Gate valve |
| CN117570217A (en) * | 2024-01-17 | 2024-02-20 | 哈电集团哈尔滨电站阀门有限公司 | Double-channel parallel double-flashboard gate valve |
| CN117570217B (en) * | 2024-01-17 | 2024-04-05 | 哈电集团哈尔滨电站阀门有限公司 | Double-channel parallel double-flashboard gate valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110831 |